#define FMT "%s=$%.2f"

// curl https://api.coingecko.com/api/v3/simple/supported_vs_currencies
#define VS "usd"

// curl https://api.coingecko.com/api/v3/coins/list
static const struct wallet_s {
    char *id;   char *fmt;
} WALLET[] = {
    {"bitcoin", "BTC"},
    {0},
};